MaryAnn Gobbo figures she has taught more than 3,000 dogs the finer points of good behavior during her four decades with the Park Ridge Park District.

That’s a lot of Milk Bones.

Gobbo, who taught her first Park Ridge obedience class in 1974 after a decade of working with dogs in Des Plaines, retired this spring, handing her leash, so to speak, over to trainers Gloria and Bill Urquhart.